Sharepoint client object model: How to get all the fields in a list - sharepoint

Question

I have a list named "Discussions List". I want to bring all columns from the list.
I want to know how to do it SharePoint Client Object Model.

Answer 1

OK. Found the solution. Answer Here using a list I'm getting by title, but will work with any method:
// Get your ClientContext for your site in 'clientContext'
SP.List oList = clientContext.Web.Lists.GetByTitle("List Title Here");
SP.FieldCollection fieldColl = oList.Fields;
clientContext.Load(fieldColl);
clientContext.ExecuteQuery();
foreach (SP.Field fieldTemp in fieldColl)
{
MessageBox.Show(fieldTemp.InternalName.ToString()); //I used MessageBox to show, but you can do whatever you like with it here.
}

Answer 2

Bingo. You're going to love this. Thank goodness for generics and Linq!
// return all rows and (selected) fields of a list--fields are included dynamically
private Dictionary<string,Dictionary<string,object>> getListData( ClientContext ctx )
{
Log.LogMessage( "Fetching {0}{1}", ctx.Url, ListName );
var list = ctx.Web.Lists.GetByTitle( ListName );
// fetch the fields from this list
FieldCollection fields = list.Fields;
ctx.Load( fields );
ctx.ExecuteQuery();
// dynamically build a list of fields to get from this list
var columns = new List<string> { "ID" }; // always include the ID field
foreach( var f in fields )
{
// Log.LogMessage( "\t\t{0}: {1} of type {2}", f.Title, f.InternalName, f.FieldTypeKind );
if( f.InternalName.StartsWith( "_" ) || f.InternalName.StartsWith( "ows" ) ) continue; // skip these
if( f.FieldTypeKind == FieldType.Text ) // get Text fields only... but you can get other types too by uncommenting below
// || f.FieldTypeKind == FieldType.Counter
// || f.FieldTypeKind == FieldType.User
// || f.FieldTypeKind == FieldType.Integer
// || f.FieldTypeKind == FieldType.Number
// || f.FieldTypeKind == FieldType.DateTime
// || f.FieldTypeKind == FieldType.Lookup
// || f.FieldTypeKind == FieldType.Computed
// || f.FieldTypeKind == FieldType.Boolean )
{
columns.Add( f.InternalName );
}
}
// build the include expression of which fields to fetch
List<Expression<Func<ListItemCollection, object>>> allIncludes = new List<Expression<Func<ListItemCollection, object>>>();
foreach( var c in columns )
{
// Log.LogMessage( "Fetching column {0}", c );
allIncludes.Add( items => items.Include( item => item[ c ] ) );
}
// get all the items in the list with the fields
ListItemCollection listItems = list.GetItems( CamlQuery.CreateAllItemsQuery() );
ctx.Load( listItems, allIncludes.ToArray() );
ctx.ExecuteQuery();
var sd = listItems.ToDictionary( k => k["Title"] as string, v => v.FieldValues ); // FieldValues is a Dictionary<string,object>
// show the fields
foreach( var i in sd.Keys )
{
Log.LogMessage( "\tItem: {0}", i );
foreach( var c in columns )
{
Log.LogMessage( "\t\t{0}: {1}", c, sd[ i ][ c ] );
}
}
return sd;
}